Fixes for publication header (data package page)
Removed unwanted headers on data-package page
Cleanup of data-package pages; making file listing conditional.
Merge branch 'dryad-staging' into jima-data-package-page

Conflicts:
	dspace/modules/xmlui/src/main/webapp/themes/Mirage/DryadItemSummary.xsl
Merge pull request #175 from datadryad/jima-data-package-page

Fixes for data package page